61426320 has 80 divisors (see below), whose sum is σ = 191481792. Its totient is φ = 16289280.

The previous prime is 61426301. The next prime is 61426331. The reversal of 61426320 is 2362416.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50034 + ... + 51246.

Almost surely, 2^61426320 is an apocalyptic number.

61426320 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61426320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95740896).

61426320 is an abundant number, since it is smaller than the sum of its proper divisors (130055472).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61426320 is a wasteful number, since it uses less digits than its factorization.

61426320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440 (or 1434 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 61426320 is about 7837.4944976057. The cubic root of 61426320 is about 394.5646434506.

Adding to 61426320 its reverse (2362416), we get a palindrome (63788736).

The spelling of 61426320 in words is "sixty-one million, four hundred twenty-six thousand, three hundred twenty".